How to take your impressions:

Read all instructions through once before starting. You will need a stopwatch and a timer. Note: Be careful. Once the putty is a uniform colour it will set fairly quickly.

1: Select the best fitting tray for your mouth. For reference, the tray for the upper arch is fuller (to accommodate the roof of the mouth). If you’re stuck between 2 sizes, always opt for the bigger tray.

2: Take one ball of coloured putty and knead it with a ball of white putty. This should take around 30 seconds (use a timer). Form a roll that’s around 3 inches long and insert it into the tray. Note: Use ALL of the putty.

3: Whilst looking in a mirror, open your mouth as wide as you can and push the impression tray onto your teeth. As a guide, place your front teeth in the middle of the roll of putty (i.e. not too far towards the front of the tray). Do not bite down but make sure to push the putty over your gum line. Pull your lip over the tray and leave it in place for 5 minutes (again, using a timer).

4: Remove the tray from your mouth. Do not remove the putty from the tray.

5: Use the checklist below to confirm that your impression is suitable to send back.

6: Put the tray in the prepaid envelope and put it in your nearest postbox. Please include any pots & unused trays in the return envelope.

7: We’ll do the rest! Sit back and wait for your shiny new retainer or night guard to be shipped straight to your door.

Impression Checklist


I’m not sure my impressions are good enough. What should I do?

Feel free to email a picture to Be sure to send the picture from the same angle as the example photo above (not an overhead view to ensure we can see the front teeth). We will let you know if there are any issues ASAP. Please mention what number tray was used.

If my impressions aren’t good enough what will happen?

Don’t worry! If we can’t use your impressions, we will resend the kit to you. If you need any advice, we’re here to help.

My prepaid envelope has expired. What shall I do?

Don’t worry if you haven’t managed to post your impression by the date on the prepaid envelope – it honestly doesn’t matter! Royal Mail will still deliver it to us as normal.

If there’s anything else, don’t hesitate to reach out to us at